2022-23
- 38 teams
2022
- 1 team
2021-22
- 19 teams
2020-21
- 30 teams
2019-20
- 18 teams
2018-19
- 17 teams
2017-18
- 8 teams
2016-17
- 4 teams
2015-16
- 4 teams
2014-15
- 3 teams
2013-14
- 4 teams
2012-13
- 6 teams
2011-12
- 4 teams
2010-11
- 3 teams
2009-10
- 6 teams
2008-09
- 7 teams
2007-08
- 3 teams
2006-07
- 4 teams
2005-06
- 4 teams
2004-05
- 3 teams
2003-04
- 3 teams
2002-03
- 3 teams
2001-02
- 1 team
2000
- 1 team
1999-00
- 2 teams
1998-99
- 3 teams
1998
- 1 team
1997-98
- 5 teams
1996-97
- 3 teams
1995-96
- 4 teams
1994-95
- 2 teams
1994
- 1 team
1993-94
- 1 team
1992
- 1 team
1991-92
- 3 teams
1991
- 1 team
1990-91
- 2 teams
1989-90
- 2 teams
1988-89
- 1 team
1987-88
- 1 team
1986-87
- 3 teams
1983
- 1 team
1981
- 1 team
1980-81
- 5 teams
1979-80
- 4 teams
1978-79
- 3 teams
1977-78
- 2 teams
1972-73
- 3 teams
1972
- 1 team
1971-72
- 4 teams
1970-71
- 1 team
1969-70
- 4 teams
